Cam for stamp-mills.



Nb. 697,9. Y Patented Apr. a, |902. d. C. H. VAUGHT. CAM FuA STAMPMILLS.

led u (Application A g 15, 1899. Renewed Sept. 25, 1901.)

(N0 Model.)

UNTTED STATES PATENT OFFICE'.

v JAMES C. H. VAUGHT, OF PHILLIPSBURG, MONTANA.

CAM FOR STAM P-IVIILLS.

SPECIFICATION forming part of Letters Patent No. 697,119, dated April 8,1902.

Application filed August 15, 1899. Renewed September 25, 1901. SerialNo. 76,532. (No model.)

To all whom it may concern:

Be it known that I, JAMES C. H. VAUGHT, a citizen of the United States,residing at Phillipsburg, in the county of Granite and State ofMontana,have invented a new and useful Cam for Stamp-lllills, of which thefollowing is a specification.

The invention relates to improvements in cams for stamp-mills.

The object of the present invention is to improve the construction ofcams for stampmills, more especially the means for securing removableshoes to the same, whereby the engaging faces of the cams may be readilyremoved Wheu Worn Without discarding the entire cam. Y

A further object o' the invention is to provide a locking mechanismwhich will be so arranged that the pressure or friction resulting fromthe engagement of the cam with a tappet will operate to hold a shoeirmly in engagement with the body portion of the cam.

Another objectof the invention is to secure the shoes to a cam withoutemploying bolts and nuts or similar fastening devices and to enable theshoes to be quickly detached when desired.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is a side elevation, partly in section,showing a cam provided With shoes constructed in accordance with thisinvention. Fig. 2 is a transverse sectional view on line 2 2 of Fig. 1.Fig. 3 is a detail perspective view of one of the arms of the cam,illustrating the construction of the dovetailed groove. Fig. 4 is aperspective view of one of the shoes. Figs. 5 and 6 are enlarged detailviews of portions of the cam and the shoe.

Like numerals of reference designate corresponding parts in all Jtheiigures of the drawings.

1 designates a cani provided with oppositely-disposed arms 2 of theusual form, adapted to engage a tappet of a stampstem, and each of thearms is provided at its curved engaging face with a removable shoe 3,forming a Wear-plate and adapted to receive the wear incident to theengagement of the cam l with a t-appetv and capable of being readilyremoved and renewed Without discarding the entire cam. The shoe 3, whichis curved to conform to the configuration of the adjacent face of thearm of the cam, is provided on its inner face with a curved longitudinalrib 4, formed integral With' the shoe and fitting Within a groove 5 ofthe cam and detachably inter-locked with the latter. The groove 5 isdisposed longitudinally of the curved edge of the arm of the cam, and itis provided at intervals with opposite recesses 6, adapted to receivetapering enlargements or lugs 7, located at opposite sides of thelongitudinal rib 4. The recesses 6 are tapering, and the Ilugs '7 formtapering enlargements of the rib 4, as clearly illustrated in Fig. 4 ofthe accompanying drawings. The transverse shoulders 8 of the taperingrecesses 6 are beveled or inclined, the bevel or inclination being fromthe bottom of the groove 5 toward the inner end of the cam, whereby theshoe is moved outward or in the direction of the outer end of the arm ofthe cam in introducing the rib into the groove. The side edges of thetapering recesses are undercut or inclined to form dovetailedportions,and the tapering enlargements of the rib have inclined sideedges, which are inter-locked by sliding the rib outward longitudinallyof the groove. As the enlarged portions or recesses ofthe groove tapertoward the outer end of the arm and as the enlargements of the rib aresimilarly tapered, it Will be clear that the pressure resulting from theengagement of the cam with a tappet Will operate to force the shoetightly in engagement with the walls of the tapered portions of thegroove, whereby the shoe will be effectually prevented from becomingaccidentally disengaged from the cam While the stamp-mill is inoperation. The transverse shoulders 9 of the enlargements 7 are beveledor inclined to fit the transverse shoulders of the tapering recesses ofthe groove. After the shoe has been moved outward sufliciently tointerlock the rib firmly With the cam it is retained in such engagementby a `plug of soft metal, which is poured into the inner end of thegroove While the metal is in a molten condition, and this plug lO, Whichmay consist of Babbitts metal or any other suitable material, may beread IOO ily extracted when it is desired to remove the shoe. Also,should the shoe be forced outward slightly by the action of the camagainst a tappet the plug may be expanded by hammering it.

The invention has the following advantages: The shoe, which is simpleand comparatively inexpensive in construction, is adapted to receive thewear resulting from the engagement of the cam with the tappet, and itmay be readily removed when it is desired to renew the engaging face ofthe cam, and it obviates the necessity of discarding the latter. Themeans for interlocking the shoe with the cam are concealed beneath theshoe, and bolts and nuts and similar fastening devices, which are liableto be struck and injured bya tappet, are not employed. The pressureincident to the engagement of the cam with a tappet tends to draw theshoe outward on the cam, whereby the shoe is held firmly interlockedwith the same.

Changes in the form, proportion, size, and the minor details ofconstruction within the scope of the appended claims may be resorted towithout departing from the spirit or sacricing any ofthe advantages ofthis invention.

What is claimed is 1. A device of the class described comprising a camprovided with dovetailed recesses, and a shoe having lugs orenlargements arranged on its inner face and detachably interlocked withthe dovetailed recesses, substantially as described.

2. A device of the class described comprising a cam provided at itsengaging face with a longitudinal groove having a series ot' taperingrecesses with undercut edges, and a shoe detachably interlocked with thecam and provided at its inner face with a rib having taperingenlargements engaging the said recesses, substantially as described.

3. A device of the class described comprising a cam provided with alongitudinal groove having outwardly-tapered dovetailed recesses, and ashoe provided with a longitudinal rib arranged in said groove and havingoutwardly-tapered enlargements interlocking with the dovetailedrecesses, substantially as described.

4:. A device of the class described comprising a cam having alongitudinal groove provided with dovetailed recesses, a shoe having arib arranged in the groove and provided with lugs or enlargementsinterlocked with the said recesses, and a plug or key of soft metalarranged within the inner end of the groove and engaging the shoe,substantially as described.

5. A device of the class described comprisinga cam provided with alongitudinal groove having tapering recesses with undercut side Wallsand beveled transverse shoulders,a shoe provided with a rib havingtapering lugs provided with undercut side edges and beveled end edges,and a plug or key engaging the inner edge of the shoe, substantially asdescribed.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

JAMES C. H. VAUGHT.

Witnesses:

J. Ross CoLHoUN, Y. P. HAHN.

